Backlight module and liquid crystal display apparatus

Abstract

The present invention discloses a backlight module and a liquid crystal display apparatus. The backlight module is employed in a liquid crystal display apparatus having a back plate and a plurality of LEDs. The liquid crystal display apparatus has a display area in accordance with the back plate and overlaps therewith, and the display area has a display area center line. The display area center line has a center corresponding to the LEDs. The LEDs are classified to belong to several positive voltage bins respectively. The LEDs belonging to a lower positive voltage bin are positioned closer to the center and the LEDs belonging to a higher positive voltage bin are positioned farther to the center.

What is claimed is: 
     
       1. A backlight module, employed in a liquid crystal display apparatus, having a back plate and a plurality of Light emitting diodes, the liquid crystal display apparatus has a display area in accordance with the back plate and overlaps therewith, and the display area has a display area center line, and the display area center line has a center corresponding to the Light emitting diodes, characterized in that the Light emitting diodes are classified to belong to several positive voltage bins respectively, wherein the Light emitting diodes belonging to a lower positive voltage bin are positioned closer to the center and the Light emitting diodes belonging to a higher positive voltage bin are positioned farther from the center. 
     
     
       2. The backlight module of  claim 1 , characterized in that the backlight module is a direct light type backlight module. 
     
     
       3. The backlight module of  claim 2 , characterized in that the backlight module further comprises a plurality of light bars positioned on the back plate and the Light emitting diodes are positioned on the light bars. 
     
     
       4. The backlight module of  claim 3 , characterized in that the center is substantially at a center position of the back plate, the light bars are symmetrically laid out regarding the center and the Light emitting diodes are categorized into several light groups in accordance with the several positive voltage bins, wherein a light group belonging to a lower positive voltage bin is positioned on a light bar closer to the center and a light group belonging to a higher positive voltage bin is positioned on a light bar farther from the center, and a light group belonging to a positive voltage bin between the higher positive voltage bin and the lower positive voltage bin is positioned between the light group belonging to higher positive voltage bin and the light group belonging to the lower positive voltage bin. 
     
     
       5. The backlight module of  claim 2 , characterized in that the Light emitting diodes are directly laid out on the back plate. 
     
     
       6. The backlight module of  claim 1 , characterized in that the backlight module is a side light type backlight module further comprising a light guide plate positioned at a side perpendicular to the display center line. 
     
     
       7. The backlight module of  claim 6 , characterized in that the backlight module further comprises at least one light bar corresponding to the light guide plate wherein the said light bar is positioned at the side where the light guide plate is positioned, and the Light emitting diodes are positioned on the at least one light bar. 
     
     
       8. The backlight module of  claim 7 , characterized in that the at least one light bar is symmetrically laid out regarding the center and the Light emitting diodes are categorized into several light groups in accordance with the several positive voltage bins, wherein a light group belonging to a lower positive voltage bin is positioned on a light bar closer to the center and a light group belonging to a higher positive voltage bin is positioned on a light bar farther from the center, and a light group belonging to a positive voltage bin between the higher positive voltage bin and the lower positive voltage bin is positioned between the light group belonging to higher positive voltage bin and the light group belonging to the lower positive voltage bin. 
     
     
       9. The backlight module of  claim 8 , characterized in that the light groups respectively comprise Light emitting diodes classified to belong to the same positive voltage bin. 
     
     
       10. The backlight module of  claim 6 , characterized in that an incident surface of the light guide plate facing the at least one light bar is a plane or a jagged structure surface. 
     
     
       11. The backlight module of  claim 7 , characterized in that an incident surface of the light guide plate facing the at least one light bar is a plane or a jagged structure surface. 
     
     
       12. The backlight module of  claim 8 , characterized in that an incident surface of the light guide plate facing the at least one light bar is a plane or a jagged structure surface. 
     
     
       13. The backlight module of  claim 9 , characterized in that an incident surface of the light guide plate facing the at least one light bar is a plane or a jagged structure surface. 
     
     
       14. The backlight module of  claim 6 , characterized in that an incident surface of the light guide plate facing the at least one light bar comprises a plurality of concaves or a plurality of convexes. 
     
     
       15. The backlight module of  claim 7 , characterized in that an incident surface of the light guide plate facing the at least one light bar comprises a plurality of concaves or a plurality of convexes. 
     
     
       16. The backlight module of  claim 8 , characterized in that an incident surface of the light guide plate facing the at least one light bar comprises a plurality of concaves or a plurality of convexes. 
     
     
       17. The backlight module of  claim 9 , characterized in that an incident surface of the light guide plate facing the at least one light bar comprises a plurality of concaves or a plurality of convexes. 
     
     
       18. A liquid crystal display apparatus, comprising a backlight module, characterized in that the backlight module comprises:
 a back plate, positioned at the bottom of the backlight module, the liquid crystal display apparatus has a display area in accordance with the back plate and overlaps therewith, the display area has a display area center line; and 
 a plurality of Light emitting diodes, classified to belong to several positive voltage bins respectively and the display area center line has a center corresponding to the Light emitting diodes, 
 
       wherein the Light emitting diodes belonging to a lower positive voltage bin are positioned closer to the center and the Light emitting diodes belonging to a higher positive voltage bin are positioned farther from the center.